I have spent the past few weeks rewriting MegaHAL in Ruby and getting it back online, after a brief absence.

You can chat with MegaHAL here: http://megahal.kranzky.com/

MegaHAL is also available as a Ruby gem, which includes a console mode, all open source and unencumbered by a license. See the GitHub page for more: https://github.com/jasonhutchens/megahal/

Enjoy!